DI-4108 and DI-4208 Hardware Manual
Controls, Indicators, and Connections
23
4-20mA Current Loop Measurements
Use the following diagram for 4-20mA current loop measurement connections.
The shunt resistor should be placed on the low side of the circuit as shown below:
Status
D0
D1
D2
D3
D4
D5
D6
Model DI-4108 or DI-4208
USB
Button
+5V GnD
CH8
CH7
CH6
CH5
CH4
CH3
CH2
CH1
120 V rms
0-25V Max
Count
Rate
Record
Event
Drive
www.dataq.com
±2 to ±100 V F.S.
Ethernet
Shunt Resistor
Model R250
+
-
4-20 mA
current source
I
4-20mA
Current Loop
Transmitter
Loop Power
Supply
To DI-4108 or DI-4208
Analog Input Channel
Shunt Resistor
+
-
+
-